Attachment for shoe-sole-stitching machines



Aug. 26 19'24.

ATTACHMENT FOR SHOE SOLE STITCHING MACHINES Filed Feb. 19.. 1923 lil Patented ug. 26, i924.

stares carica.

ATTACHMENT FOR SHOE-SOLE-STITCHING MACHEITIS.`

Application led Februa'ryl, 1923. Seriall No. 619,856.

To all whom it may concern.'

Be it known that l, ALESSANDRO LALLI, a

subject oit the King of Italy, residing at Berwyn, in the county of Chester and State of Pennsylvania, have invented certain new and useful improvements in Attachments for Shoe-Sole-Stitching Machines, of which the following is a specilication.

This invention relates generallyv to shoe machinery, having more particular reference to an attachment for machines for stitching the soles of shoes, the invention being designed more particularly for use in connection with the machine known conimercially as the Victor lockstitch machine.

ln machines for stitching the soles of shoes it is customary to provide a guard plate in front of the awl, both to protect the hand ofthe mechanic and also to prevent the awl from accidently piercing the upper of the shoe. ln the Victor machine above referred to a plate of this sort is pro l vided, but it is disadvantageous in that it does not adequately protect the handthat is holding the shoe against the work table, the present invention having for an object to provide a form of guard plate which can be readily applied to machines already in use in place of the present guard plate, and which also is arranged for adjustment to permit of the marginal portion of the sole being positioned to have the line of stitching at such slightly diderent distance from its extreme edge as may be desired.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the lollowing description and accompanying drawings, and to the appended claims in which the various novel 'teatures of the invention,

are more particularly set forth.

Fig. l of the drawings is a Alace view of my improved 'guard plate indicating it in position on a sole stitching machine..

2 is a transverse vertical sectional view taken along the line Q-/ of Fig. 3 is a top view of the guard plate alone..

Fi". i along the line l-ll of l g Fig. 5 is a detail elevation of the locking element tor the iii-strap which engages one of the frame arms or@ the machine to adjnstably position the guard plate.

Fig. t-is a detail perspective view et this lil-strap.

rlhe fragmentaryY showing of the machine parts in Fig. l of the drawings show the machine as seen in face view, as well as showing the guard plate in face view. In these machines the main trame presents a vertical wall element l0 which extends in a direction from front to rear thereof and is positioned to the lett oi the stitching elements. From this wall element 10 a fixed arm 1l projects to the right and forms a support or table upon which the edge of the sole to be stitched', indicated at S in Fig. 2, is placed as indicated in said ligure, awl workingl upward through a suitable aperture in the end of this arm, and the, needle working downward. rlhe awl and the needle are indicated simply in Fig. 2 by the arrows l2 and 13 respectively.

`With the usual type of guard plate provided in this machine the space to the'left of the needle and awl is'left unguarded, and there is a danger of the workman getting one of his fingers in the way ot either awl or needle. To obviate this, and also to provide for adjustment of the guard `plate as previously specified, the ,latter is secured upon the face of the wall element 10 and is twisted or bent to extend to the right along the front edge of the arm ll below the latter. 'llhe guard plate as a whole is numbered 15, the lower portion which is secured to the wall element l() is numbered l5', and the upper portion which is extended along the arm 1l is numbered 15a.

ln order to secure the guard plate l5 to the wall element 1G it is not needful to bore any additional holes therein or to make any changes in the structure thereof, the guard plate being attached to the wall by loosening the screw l? upon which one ot' the thread :feed 'pulleys i8 is mounted and placing the guard plate on the screw between the said pulley and the tace of the wall 10, the guard plate having a suitable hole l in lower end thereof to receive the screw l?. its the guard plate is of thin metal it niay be so attached to the wall without in any way interfering with the functioning ot the pulley.

@n account ot the thinness. and consequent resiliency., oi" the guard plate an aihlitioual holding means for the portion '15a thereot' is required, the nove. shown wmprising a lil-strap 2Q which straddles the arm and is secured at its ends to the guard plate. 'Fo permit of desired variathe means l have herei than the screw 28.

tion ot the positioning of the guard plate this U-strap is secured to the latter as follows: Formed in the guard plate is a hollow boss which is internally screw threaded and into which there is threaded a sleeve 26 of greater length than the said boss and whose ends are preferably slightly rounded as shown. l

The ends of the strap straddle the ends of this sleeve and are forme-d with suitable openings 27 through which is passed a bolt 28 having a nut Z9 threaded thereon, the bolt passing through the sleeve and being of smaller diameter than the bore of the latter to permit of angular adjustment. The sleeve is formed with a longitudinal slot 30 in one wallvthereoi which enters from the end adaptedlto have the head 28 of` the bolt adj acent it, this slot 30 terminating near the other end of the sleeve. Formed on the head of the bolt 28 is a wedge shaped projectionyl `which is adapted to engage in the open end of the slot 30 toeXpand the sleeve 2G when the nut 29 is tightened, and thus bind the sleeve in the boss 25, as well as bind the strap 22 on the sleeve. By this means such adjustment as may be required canbe readily obtained, as the sleeve can be moved longitudinally in the boss 25, while the angle of the strap 22 can he varied because of the bore of the sleeve being larger' ,lo accon'unodate the wedge 31 the aperture 2T in one end of the strap 22 is extended at the top as shown at. i

ln the use of these machines it is customary for the workman, after properly positioning the shoe with the edge ofthe sole in` proper relation to the awl and needle, to move the shoe along the support. with the right hand, while gripping the shoe with the left hand to ensure ot the upper being drawn taut, and with my improved guard plate all danger of hurt to the left hand trom either needle or awl is prevented.

Having thus described my invention what I claim as new and desire to protect by lietters Patent of the i'lnited States is as tol; lows:

l.. ln a shoe sole stitching machine, an awl and a needle, a wall element extending from t'ront toward the rear' ot' the machine, an arm projecting from said wall element into the path of said awl and needle, and a guard plate secured both to said wall element and to said arm, the means for securing` the said guard plate to said arm coinprising a U-strap straddling 'the arm and secured at its ends 'to the said guard plate,

Q in a shoe sole stitching machine, an awi and a needle, a Wall element extending from front toward the rear of the machine, an arm projecting from said Wall element into the path of said awl and needle, and a guard plate secured both to said wall gua-rd plate to said arm comprising a U- strap straddling the arm and secured at its ends to the said guard plate, said guard plate comprising a lower portion lying in Contact with said wall element and an upper portion extending along said arm.

3. In a'shoe sole stitching machine, an awl and a needle, a wall element extending from front toward the rear ofthe machine, an arm projecting from said Wall element into the path of said awl and needle, and a guard plate secured. both to said wall element and to said arm, the means for securing the said guard plate to said arm comprising a U- 'strap straddling the arm and secured at its ends to the said guard plate, said guard plate comprising a lower portion lying in contact' with said wall element and an upper portion extending along said arm, said U-strap being secured to said vupper portion.

4. In a shoe sole stitching machine, an a-wl and a needleda vertical Wall element extending in a direction from front to rear of -the machine, a xed arm projecting from vsaid wall element onto the path of said awl and said needle, a U-strap straddling said arm, a sleeve threaded through an aperture in said plate and straddled at its ends by the ends of the said strap, a bolt passed through the sleeve to secure the ends of the said itl-strap to the latter, and a device adapted to secure the said sleeve against movement Ln Tthe said aperture by ytigltrtening the said in a shoe sole stitching machine, an awl and a needle, a vertical wall element extending in a direction from front to rear of the machine, a fixed arm projecting from said wall element onto the path of said awt and said needie, ay U-strap straddling said arm, a sleeve threaded through an aperture in said plate and straddled at its ends by the rends of the. said strap, a bolt passed through ends of the said` the sleeve to secure the U-stra'p to the latter, and a device adapted to secure the said sleeve against movement in the said aperture by tightening the said holt, said means comprising a wedge shaped projection on the head oit the bolt adapted to engage in a longitudinal slot in the sleeve to expand the latter. g

.in testimony whereeii l have aiif'med my signature;

element andto said arm, the means for securing the sald- 

